ENZYME entry: EC 2.4.1.243

Accepted Name
6(G)-fructosyltransferase.
Alternative Name(s)
6(G)-FFT.
6(G)-fructotransferase.
6(G)-FT.
Fructan:fructan 6(G)-fructosyltransferase.
Reaction catalysed
(1-beta-D-fructofuranosyl-(2->1)-)(m+1) alpha-D-glucopyranoside + (1-beta-D-fructofuranosyl-(2->1)-)(n+1) alpha-D-glucopyranoside <=> (1-beta-D-fructofuranosyl-(2->1)-)(m) alpha-D-glucopyranoside + (1-beta-D-fructofuranosyl-(2->1)-)(n+1) beta-D-fructofuranosyl-(2->6)-alpha-D-glucopyranoside (m > 0; n >= 0)
Comment(s)
  • This enzyme catalyzes the transfer of the terminal (2->1)-linked beta-D-fructosyl group of a mono- or oligosaccharide substituent on O-1 of the fructose residue of sucrose onto O-6 of its glucose residue.
  • For example, if 1-kestose (1(F)-(beta-D-fructofuranosyl)sucrose) is both the donor and recipient in the reaction shown above, i.e., if m = 1 and n = 1, then the products will be sucrose and 6(G)-di-beta-D- fructofuranosylsucrose.
  • In this notation, the superscripts F and G are used to specify whether the fructose or glucose residue of the sucrose carries the substituent; alternatively, this may be indicated by the presence and/or absence of primes.
  • Sucrose cannot be a donor substrate in the reaction (i.e. m cannot be zero) and inulin cannot act as an acceptor.
  • Side reactions catalyzed are transfer of a beta-D-fructosyl group between compounds of the structure 1(F)-(1-beta-D- fructofuranosyl)(m)-6(G)-(1-beta-D-fructofuranosyl)(n) sucrose, where m >= 0 and n = 1 for the donor, and m >= 0 and n >= 0 for the acceptor.
Cross-references
PROSITEPDOC00532
BRENDA2.4.1.243
EC2PDB2.4.1.243
ExplorEnz2.4.1.243
PRIAM enzyme-specific profiles2.4.1.243
KEGG Ligand Database for Enzyme Nomenclature2.4.1.243
IUBMB Enzyme Nomenclature2.4.1.243
IntEnz2.4.1.243
MEDLINEFind literature relating to 2.4.1.243
MetaCyc2.4.1.243
UniProtKB/Swiss-Prot
P92916, GFT_ALLCE;  Q5FC15, GFT_ASPOF;  

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